CA959948A - Digitally controlled frequency filter - Google Patents

Digitally controlled frequency filter

Info

Publication number
CA959948A
CA959948A CA139,925A CA139925A CA959948A CA 959948 A CA959948 A CA 959948A CA 139925 A CA139925 A CA 139925A CA 959948 A CA959948 A CA 959948A
Authority
CA
Canada
Prior art keywords
frequency filter
digitally controlled
controlled frequency
digitally
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA139,925A
Other versions
CA139925S (en
Inventor
Harold H. Henegar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Singer Co
Original Assignee
Singer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of CA959948A publication Critical patent/CA959948A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R29/00—Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series-parallel selection, programmable connectors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/126—Frequency selective two-port networks using amplifiers with feedback using a single operational amplifier
CA139,925A 1971-05-26 1972-04-18 Digitally controlled frequency filter Expired CA959948A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14702171A 1971-05-26 1971-05-26

Publications (1)

Publication Number Publication Date
CA959948A true CA959948A (en) 1974-12-24

Family

ID=22520022

Family Applications (1)

Application Number Title Priority Date Filing Date
CA139,925A Expired CA959948A (en) 1971-05-26 1972-04-18 Digitally controlled frequency filter

Country Status (3)

Country Link
US (1) US3769606A (en)
CA (1) CA959948A (en)
GB (1) GB1377402A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890577A (en) * 1973-08-15 1975-06-17 Westinghouse Air Brake Co Vital active low-pass filter
DE2747857C3 (en) * 1977-10-26 1980-07-24 Karl Heinz Dr.-Ing. 8500 Nuernberg Feistel Four-pole, the transfer function of which is adjustable
FR2427709A1 (en) * 1978-05-31 1979-12-28 Trt Telecom Radio Electr Two-wire to four-wire telephone circuit adaptor - has board with bridging contacts movable to another position on main circuit board
US4371901A (en) * 1980-10-16 1983-02-01 Honeywell Inc. Programmable signal equalizer
WO1982002808A1 (en) * 1981-02-06 1982-08-19 Ludowyk Christopher John Gating circuit
US4633200A (en) * 1985-01-29 1986-12-30 Ampex Corporation Voltage controlled equalizer
US5652544A (en) * 1994-11-09 1997-07-29 Crest Audio Inc. Apparatus and method for programming an amplifier
US5652542A (en) * 1994-11-09 1997-07-29 Crest Audio, Inc. Digital signal processor for amplifier
FR2749453B1 (en) 1996-05-31 1998-09-04 Sgs Thomson Microelectronics ANALOG AUDIO FILTER FOR ACUTE FREQUENCIES
US6259169B1 (en) * 1999-10-06 2001-07-10 Designtech International, Inc. Flexible alarm bypass module for a vehicle
US6825712B2 (en) * 2002-03-29 2004-11-30 Matsushita Electric Industrial Co., Ltd. Filter circuit, front end of communication system including the filter circuit, and communication device including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510585A (en) * 1980-10-22 1985-04-09 Geosource Inc. Electronic filter

Also Published As

Publication number Publication date
US3769606A (en) 1973-10-30
GB1377402A (en) 1974-12-18

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